KIAS
Knots indicated airspeed.
PHAK Glossary: K
3 entries, reproduced verbatim from the Glossary of the Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25C (July 2023).
Knot
The knot is a unit of speed equal to one nautical mile (1.852 km) per hour, approximately 1.151 mph.
Kollsman window
A barometric scale window of a sensitive altimeter used to adjust the altitude for the altimeter setting.
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Source. Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C), Glossary, FAA-H-8083-25C (July 2023), pages G-1 to G-36, reproduced verbatim from the FAA’s PDF (https://www.faa.gov/regulations_policies/handbooks_manuals/aviation/phak; SHA-256 begins 247929cace0ab56b…). The PDF’s line breaks were re-joined into one paragraph per entry; no word was changed. A United States Government work. Check the current handbook before you rely on an entry here.